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* [Bug libfortran/81986] sanitizer detects negation of large number in string.c
[not found] <bug-81986-4@http.gcc.gnu.org/bugzilla/>
@ 2021-02-27 9:21 ` zeccav at gmail dot com
2021-02-28 11:04 ` dominiq at lps dot ens.fr
` (4 subsequent siblings)
5 siblings, 0 replies; 6+ messages in thread
From: zeccav at gmail dot com @ 2021-02-27 9:21 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=81986
Vittorio Zecca <zeccav at gmail dot com> changed:
What |Removed |Added
----------------------------------------------------------------------------
Component|sanitizer |libfortran
--- Comment #4 from Vittorio Zecca <zeccav at gmail dot com> ---
On current trunk with sanitized libgfortran.so.5 I get
gfortran gfbug142.f
ldd ./a.out
........
libgfortran.so.5 =>
/home/vitti/gcc-150221-undefined/x86_64-pc-linux-gnu/libgfortran/.libs/libgfortran.so.5
(0x000014a739133000)
libubsan.so.1 =>
/home/vitti/local/gcc-150221-undefined/lib/../lib64/libubsan.so.1
(0x000014a738293000)
libstdc++.so.6 =>
/home/vitti/local/gcc-150221-undefined/lib/../lib64/libstdc++.so.6
................
./a.out
../../../gcc-150221/libgfortran/io/write.c:835:7: runtime error: negation of
0x80000000000000000000000000000000 cannot be represented in type '__int128';
cast to an unsigned type to negate this value to itself
../../../gcc-150221/libgfortran/runtime/string.c:199:11: runtime error:
negation of 0x80000000000000000000000000000000 cannot be represented in type
'__int128'; cast to an unsigned type to negate this value to itself
80000000000000000000000000000000
^ permalink raw reply [flat|nested] 6+ messages in thread
* [Bug libfortran/81986] sanitizer detects negation of large number in string.c
[not found] <bug-81986-4@http.gcc.gnu.org/bugzilla/>
2021-02-27 9:21 ` [Bug libfortran/81986] sanitizer detects negation of large number in string.c zeccav at gmail dot com
@ 2021-02-28 11:04 ` dominiq at lps dot ens.fr
2021-03-03 7:08 ` cvs-commit at gcc dot gnu.org
` (3 subsequent siblings)
5 siblings, 0 replies; 6+ messages in thread
From: dominiq at lps dot ens.fr @ 2021-02-28 11:04 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=81986
Dominique d'Humieres <dominiq at lps dot ens.fr> changed:
What |Removed |Added
----------------------------------------------------------------------------
Ever confirmed|0 |1
Last reconfirmed| |2021-02-28
Status|UNCONFIRMED |NEW
--- Comment #5 from Dominique d'Humieres <dominiq at lps dot ens.fr> ---
Confirmed.
^ permalink raw reply [flat|nested] 6+ messages in thread
* [Bug libfortran/81986] sanitizer detects negation of large number in string.c
[not found] <bug-81986-4@http.gcc.gnu.org/bugzilla/>
2021-02-27 9:21 ` [Bug libfortran/81986] sanitizer detects negation of large number in string.c zeccav at gmail dot com
2021-02-28 11:04 ` dominiq at lps dot ens.fr
@ 2021-03-03 7:08 ` cvs-commit at gcc dot gnu.org
2021-03-03 11:03 ` dominiq at lps dot ens.fr
` (2 subsequent siblings)
5 siblings, 0 replies; 6+ messages in thread
From: cvs-commit at gcc dot gnu.org @ 2021-03-03 7:08 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=81986
--- Comment #6 from CVS Commits <cvs-commit at gcc dot gnu.org> ---
The master branch has been updated by Tobias Burnus <burnus@gcc.gnu.org>:
https://gcc.gnu.org/g:006693a59f7cd1310aed53a2816020bedf1fb742
commit r11-7470-g006693a59f7cd1310aed53a2816020bedf1fb742
Author: Tobias Burnus <tobias@codesourcery.com>
Date: Wed Mar 3 08:05:45 2021 +0100
libgfortran: Fix negation for largest integer [PR81986]
libgfortran/ChangeLog:
2021-03-01 Vittorio Zecca <zeccav@gmail.com>
Tobias Burnus <tobias@codesourcery.com>
PR libfortran/81986
* runtime/string.c (gfc_itoa): Cast to unsigned before
negating.
^ permalink raw reply [flat|nested] 6+ messages in thread
* [Bug libfortran/81986] sanitizer detects negation of large number in string.c
[not found] <bug-81986-4@http.gcc.gnu.org/bugzilla/>
` (2 preceding siblings ...)
2021-03-03 7:08 ` cvs-commit at gcc dot gnu.org
@ 2021-03-03 11:03 ` dominiq at lps dot ens.fr
2021-12-25 13:04 ` fxcoudert at gcc dot gnu.org
2021-12-25 14:57 ` fxcoudert at gcc dot gnu.org
5 siblings, 0 replies; 6+ messages in thread
From: dominiq at lps dot ens.fr @ 2021-03-03 11:03 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=81986
--- Comment #7 from Dominique d'Humieres <dominiq at lps dot ens.fr> ---
r11-7470 fixes the first runtime error, but I still see
../../../work/libgfortran/io/write.c:835:7: runtime error: negation of
0x80000000000000000000000000000000 cannot be represented in type '__int128';
cast to an unsigned type to negate this value to itself
This is in
sign = calculate_sign (dtp, n < 0);
if (n < 0)
n = -n;
nsign = sign == S_NONE ? 0 : 1;
^ permalink raw reply [flat|nested] 6+ messages in thread
* [Bug libfortran/81986] sanitizer detects negation of large number in string.c
[not found] <bug-81986-4@http.gcc.gnu.org/bugzilla/>
` (3 preceding siblings ...)
2021-03-03 11:03 ` dominiq at lps dot ens.fr
@ 2021-12-25 13:04 ` fxcoudert at gcc dot gnu.org
2021-12-25 14:57 ` fxcoudert at gcc dot gnu.org
5 siblings, 0 replies; 6+ messages in thread
From: fxcoudert at gcc dot gnu.org @ 2021-12-25 13:04 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=81986
Francois-Xavier Coudert <fxcoudert at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |fxcoudert at gcc dot gnu.org
--- Comment #8 from Francois-Xavier Coudert <fxcoudert at gcc dot gnu.org> ---
Will be fixed by patch at
https://gcc.gnu.org/pipermail/fortran/2021-December/057218.html
^ permalink raw reply [flat|nested] 6+ messages in thread
* [Bug libfortran/81986] sanitizer detects negation of large number in string.c
[not found] <bug-81986-4@http.gcc.gnu.org/bugzilla/>
` (4 preceding siblings ...)
2021-12-25 13:04 ` fxcoudert at gcc dot gnu.org
@ 2021-12-25 14:57 ` fxcoudert at gcc dot gnu.org
5 siblings, 0 replies; 6+ messages in thread
From: fxcoudert at gcc dot gnu.org @ 2021-12-25 14:57 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=81986
Francois-Xavier Coudert <fxcoudert at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Resolution|--- |FIXED
Target Milestone|--- |12.0
Status|NEW |RESOLVED
--- Comment #9 from Francois-Xavier Coudert <fxcoudert at gcc dot gnu.org> ---
Fixed.
^ permalink raw reply [flat|nested] 6+ messages in thread
end of thread, other threads:[~2021-12-25 14:57 UTC | newest]
Thread overview: 6+ messages (download: mbox.gz / follow: Atom feed)
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2021-02-27 9:21 ` [Bug libfortran/81986] sanitizer detects negation of large number in string.c zeccav at gmail dot com
2021-02-28 11:04 ` dominiq at lps dot ens.fr
2021-03-03 7:08 ` cvs-commit at gcc dot gnu.org
2021-03-03 11:03 ` dominiq at lps dot ens.fr
2021-12-25 13:04 ` fxcoudert at gcc dot gnu.org
2021-12-25 14:57 ` fxcoudert at gcc dot gnu.org
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